Instructions

Technical description

The core of the game is an ATmega168 controller clocked at 8

MHz by its internal RC oscillator. A matrix with 120 LEDs is

arranged in ten rows with twelve LEDs each. The microcon-

troller controls the rows in a multiplex process. The anodes

are controlled directly via ports, the cathodes via the two shift

registers HC4094. The controller can put itself in power-down

mode. All LEDs are switched off, so that the power consump-

tion drops to 20 μA Therefore no main switch is required. But-

ton S2 at PD2/INT0 and at GND can trigger an interruption

and restart the game.